Mr.Wang is a man of few words,but quick in mind.—____,you know. 

Go back to your seat. ______ time for class. [ ]

How did the thief come into the house?—He came into the house _____ the back door.[ ]

When the baby pandas see the keepers, they run over with excitement.

Have you found the information about the famous people ______ you can use for the report? -Not yet. I’ll search some on the Internet.